Freezing, freezing rain, sleet, snow ... Why is the weather so different between the north and the south of Hunan?

The distribution of water vapor between north and south is uneven, and the temperature stratification between north and south is different.

The water vapor in northern Hunan is more abundant, so the magnitude of rain and snow in northern Hunan is clearer and people's feelings are more obvious. The weather phenomena that can be directly felt are freezing, freezing rain, sleet and snow. The water vapor condition in the south-central region (Hunan) is not very good, the temperature is very low, and it feels gloomy and cold. In the south-central region (Hunan), freezing rain is not obvious, and it feels like freezing rain in Mao Mao. Different water vapor conditions lead to the difference of freezing rain level between north and south.